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Diana - the People's Princess

Diana Spencer was born on the first of July 1961 in England. She had two older sisters and a younger brother. In childhood she liked games, swimming, running and dancing. She wanted to become a dancer. Besides she loved children very much and at the age of sixteen she worked in schools for very young children.

Diana became princess, when Prince Charles, the Queen's son, asked her to be his wife and they got married. They seemed to be a happy couple at first. They had two sons. They travelled a lot they worked a lot, they visited many countries together. But Diana was not quite happy because they did different things and Charles didn't understand her.

Why was Diana the most famous, the most beautiful, the most photographed woman in the world?

Why did she win the hearts of millions and millions of people in many countries? Why did so many people come to London to remember her when she died? Why did the car accident which took her life, become such a total shock to crowds of people? Why did people feel the need to be in London at the funeral?

Why did the tears and love at the funeral move the world?

The answer is so simple. Matthew Wall, a student at St. Michael's College in Burlington said: "She was such a lovely lady. She did so much for those people less fortunate that herself".

She was a kind woman. Hundreds of people talked about Diana's kindnesses. She liked ordinary people, though she was rich and had many rich friends. Wherever she was, she was always ready to lend a hand. She was devoted to the sick and the poor. She visited hospitals for people with AIDS and for lepers and wasn't afraid to touch them, talk to them, listen to them.

She worked on children's charities, and had teamed up with Hillary Clinton in an effort to ban landmines. And it's not only money, that she wanted to give people. She wanted to give them a part of her soul, to make them happy because she was unhappy herself. She wanted to give them love, because she needed love herself.

Rock stars (Sting, Elton John), pop singer George Michael, film stars and producers (Tom Hanks, Steven Spilberg, Nicole Kidman, Tom Cruise) and other famous people were among her friends. But she had more friends among ordinary people.

Diana was seen many times in floods of tears, because of the pressures of her loveless 15-year marriage. It is not a secret that Diana was hounded and humiliated to the point of mental breakdown and was able to pull through only because she knew she had the love of the people to buoy her in her darkest hours.

She was, indeed, the People's Princess.

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Ответ:

Semensem

24.10.2021 12:51

Уравнения реакций:
SO₃ + H₂0 = H₂SO₄
H₂SO₄ + Ba(OH)₂ = BaSO₄↓ + 2H₂O
1моль серного ангидрида даёт 1 моль кислоты.
Количество вещества серного ангидрида равно отношению его объёма к молярному объёму = 5,6/22,4 = 0,25 моль.
Количество вещества серной кислоты такое же, значит она взята в недостатке и расчёт нужно вести по ней (0,25 < 0,275).
Тогда количество вещества сульфата бария тоже равно 0,25 моль.
Молярная масса сульфата бария равна 233 гр/моль.
Отсюда масса осадка равна 233х0,25 = 58,25 грамм.

ответ: 58,25 грамм.

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Ответ:

strakh1991

21.04.2022 11:09

Масса воды численно равна объему воды, так как ее плотность равна 1, значит m(H2O)= 100 г.
Тогда масса приготовленного раствора будет складываться из массы воды и массы растворенного сульфата калия: m(p-pa)=m(H2O)+m(K2SO4)=100г +5г = 105 г.

Найдем количество сульфата калия:
n= $\frac{m}{M}$
n(K2SO4)= $\frac{5}{174}$ ≈0,0287 моль

Нам нужно найти сейчас объем полученного раствора. Найдем его по формуле:
V= $\frac{m}{p}$ , где p(читается ро) - это плотность раствора.
$V_{p-pa}(K2SO4)$ = $\frac{105}{1,15}$ ≈91.3 мл. = 0,0913 л

Концентрация раствора вычисляется по формуле:
$C_{M} = \frac{n}{ V_{p-pa} }$

Вычислим ее:
$C_{M}$ = $\frac{0,0287}{0,0913}$ моль/л ≈ 0,314 моль/л

ответ: 0,314 моль/л

Забавное замечание, не требующее написание его в задачу:
Очень интересно, что без округления в ответе мы бы записали такое число: $\frac{ \pi }{10}$ моль/л.
Вот так вот составляют задачи, что можно сделать такие интересные замечания :)

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